April 25, 1894: The British Indian Hemp Drug Commission concludes that cannabis has no addictive properties, some medical uses, and a number of positive emotional and social benefits.

April 27, 1937: In a statement before the US House of Representative Ways and Means Committee, Clinton Hester testifies that a Washington Times editorial published shortly before Congress held its first hearing on the marijuana issue argued: "The fatal marihuana cigarette must be recognized as a deadly drug and American children must be protected against it."

April 30, 1984: Colombian Minister of Justice Rodrigo Lara Bonilla, who had crusaded against the Medellin cartel, is assassinated by motorcycle-riding contract killers. President Belisario Betancur, who had opposed extradition, announces, "We will extradite Colombians." Carlos Lehder is the first to be put on the list. The crackdown forces the Ochoa family, Escobar, and Óscar Rodríguez Gacha to flee to Panama for several months. A few months later, Escobar is indicted for Lara Bonilla's murder and the Ochoas and Rodríguez Gacha named as material witnesses.

April 29, 1996: At a speech at a Miami high school, President Clinton calls for a war on drugs -- for the second time. General Barry McCaffrey, the nation's drug czar, told the Cleveland Plain Dealer on May 1 that "everything the president has announced is already being done. There's nothing new here."

April 25, 2000: Despite the formal opposition of the Hawaiian Catholic Church, the Hawaii State Senate passes medical marijuana legislation, joining California, Oregon, Washington, Maine, Alaska, and Arizona in shielding medical marijuana patients from criminal prosecution.

April 24, 2001: In Oklahoma, Will Foster, 42, a medical marijuana patient who in 1995 was sentenced to 93 years in prison for growing 39 marijuana plants in his basement, is released on parole. Foster used marijuana to relieve chronic pain caused by acute rheumatoid arthritis. "My medical use of marijuana never interfered with my work, I ran a successful business," said Foster. He added, "I was minding my own business taking care of my health and my family. What was I doing to anybody that got me 93 years?"